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Siemens EF2B100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Siemens
EF2B100
Molded Case Circuit Breaker
Brand
Siemens
SKU
EF2B100
Quantity
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Siemens EF2B100 - 100A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial power distribution, the Siemens EF2B100 is a 2-pole, 100A molded case circuit breaker. It features a rugged bolt-on design and delivers dependable long-time and instantaneous trip functions. This unit mounts into legacy Siemens and I-T-E FC-1 or FC-20 panelboards. For modern upgrades, it is officially replaced by the ED62B100 model. Rated for 600VAC, it provides a 14kAIC interrupting capacity at 480V and includes load-side lugs for 10-1/0 AWG conductors.Specifications
| Brand | Siemens |
|---|---|
| Series | EF |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | EF |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens / I-T-E Panelboards, FC-1 Panelboards, FC-20 Switchboards |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, HACR Rated |
Product FAQs
8 answersWhat is the modern replacement for the legacy EF2B100 circuit breaker?
For modern panel upgrades or replacements, the EF2B100 is officially replaced by the Siemens ED62B100 molded case circuit breaker.
Which panelboards and switchboards accept the EF2B100 breaker?
This E-Frame breaker is designed to mount directly into legacy Siemens and I-T-E FC-1 panelboards, as well as FC-20 switchboards.
Is this breaker interchangeable between Siemens and older I-T-E systems?
Yes, the EF2B100 is fully compatible with both Siemens and legacy I-T-E commercial power distribution equipment that utilizes EF frame bolt-on breakers.
What wire gauge range is supported by the terminals on this breaker?
The load-side lugs accept copper or aluminum (Cu/Al) conductors ranging from 10 AWG up to 1/0 AWG.
How does the EF2B100 connect to the panelboard bus?
It features a standard bolt-on connection type for secure installation directly to the bus of compatible FC-1 and FC-20 enclosures.
Can the EF2B100 be installed in DC power systems?
Yes, in addition to its AC ratings, this breaker is rated for 250VDC applications with an interrupting capacity of 10kAIC.
What is the maximum interrupting capacity of this breaker at 240VAC?
While rated for 14kAIC at 480V and 600V, the breaker provides a higher interrupting capacity of 18kAIC when applied to 240VAC systems.
What type of trip unit is equipped on the EF2B100?
This breaker features a fixed thermal-magnetic trip unit that provides both long-time and instantaneous (LI) overcurrent protection.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- VGVictor G.Verified BuyerRated 5 out of 5 stars11/6/25Breakers fit my needs
I wish I would of shopped this I found exact breaker for 400.00 cheaper
- RFRobert F.ReviewingSiemens EF3A100 - 100A 3 Pole Motor Circuit ProtectorI recommend this productRated 5 out of 5 stars7/25/22Fast order and service for a part in good condition
Fast order and service for a part in good condition.